[Festus2]

The discoloration looks like it may be quite deep and is probably not going to be removed by a surface cleaner or restorer. I think you are going to have to remove - by sanding or paint/stain/varnish remover - the entire table finish coat and start from scratch. In other words, take it right down to the bare wood. Sand, stain, and refinish with polyurethane.

You might be able to get rid of some or most of the white but I think some discoloration will remain and I don't think you'll be happy looking at that.